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<br />n 'u' -'\::! ~ ';. <br />U o....i j .. <br /> <br />Page <br /> <br /> <br />CONTENTS <br /> <br />Abstract. . . . . .0. . . 0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 . . . . 9 <br /> <br />Introduction. . . 0 . . . . . . . . . . 0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 <br /> <br />Acknowledgments.. . .. . . .. . . .. .. . .. . .. . . . . .. . . . .. . . . .. . . .. . . .. . . 12 <br /> <br />Development of flow duration rela.tions.. .. . . . . .. . . . . . . . . . . . . . . . . . . 13 <br /> <br />Records available............................................. 13 <br />Flow duration .for period of record. " 0 . . . . . . . . . . .. . . . . . . . . . . . . . . . 13 <br />Long-term comparable relations 0 . . . . . . . . . 0 . . . . 0 .. .. . . . . . ..0. . 21 <br />. Selection of base period. .. . . . . 0 . . . . . . . . . . . .0. . . . .. . . . . . . . . . . . 23 <br />Pivot station method. . . . . . .. . . . . . . .-. . . . . . . . . 0 . . 0 . . " . . . . . . .. . . 23 <br /> <br />Flow duration data. . o. . .. . . .. . . . ." . . .-. .. .. . .. . . . .. . . . . . 0 o. .. . . .. 27 <br />.Gaging-station descriptions.... .... . .. . .. .. . . G .. G .. .. G .. G .... .. .. .. G" ...... G" 27 <br />Duration-curves.... G.... G.. G. G...... 0.....0.... 0 0.0 G........... 0........ 47 <br />Summary of data. . . . . , . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . '.' .. 175' <br /> <br />Regional mean flow.... .. .. . . . . . .. . .. . . .. .. 0 .- 0 . 0 0 . 0 .. .. . . .. . .. . . . .. .. .. . .. .. .. .. .. 0" 179 <br />Mean flow at a site. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . 179 <br />State-wide variation of mean flow. . .. . . . . .. . . . . . . . . . . . . .. . . . . .. 180 <br />Accuracy of map of mean flow. . . . . . " . . .. .. . ... . . . . . .. . ... .. 182 <br />Relation with precipitation. . . . . . . . . . . . . . . . .. . . . ... . . .. . . . . . 182 <br /> <br />Flow duration at ungaged sites. . . . . . . . . . . . . . . . . . . " . . . . . . . . . .. . .. 186 <br />Ungag.ed sites on largE> rivers. . .. . . . . ... . . " . .. . . . .. . . . . . .. . .. 186 <br />Ungaged sites of areas from 100 to 3,000 squa.re miles. . . . . . . . .. 186 <br />Position of mean flow. . .. . . . .. . .. . . . .. . . . . . . . . .. . .. .. . . . . .. 186 <br />Flow of one percent duration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 194 <br />Flow of 50 percent duration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 198 <br />Flow of one-tenth percent duration. . . . . . . . . . . . . . . . . . . . . . . . .. 198 <br />Duration of appreciable flow. . . . . . . . . . . , . . . . . . . . . . . . . . . . . . .. 198 <br />Average slope of duration CJ1rves ........................... 202 <br />Development of synthetic duration curves.. . . .. . . . . . . . . . . .. .. 204 <br />_Us~ of miscellaneous measurements. .. .. . . .. .. .. .. .. 0 .. . . .. .. .. . . . . . . . . ... 209 <br /> <br />Application of flow duration curves. . . .. . . . .. ... . . . . . .. . . . . . . . .. . .. 212 <br /> <br />3. <br />